On 11/13/2024 2:44 PM, Melody Wang wrote:
> Convert VMGEXIT SW_EXITINFO1 codes from plain numbers to proper defines.
>
> No functionality changed.
>
> Signed-off-by: Melody Wang <huibo.wang@xxxxxxx>
Reviewed-by: Pavan Kumar Paluri <papaluri@xxxxxxx>
> ---
> arch/x86/include/asm/sev-common.h | 8 ++++++++
> arch/x86/kvm/svm/sev.c | 12 ++++++------
> arch/x86/kvm/svm/svm.c | 2 +-
> 3 files changed, 15 insertions(+), 7 deletions(-)
>
> diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h
> index 98726c2b04f8..01d4744e880a 100644
> --- a/arch/x86/include/asm/sev-common.h
> +++ b/arch/x86/include/asm/sev-common.h
> @@ -209,6 +209,14 @@ struct snp_psc_desc {
>
> #define GHCB_RESP_CODE(v) ((v) & GHCB_MSR_INFO_MASK)
>
> +/*
> + * Error codes of the GHCB SW_EXITINFO1 related to GHCB input that can be
> + * communicated back to the guest
> + */
> +#define GHCB_HV_RESP_SUCCESS 0
> +#define GHCB_HV_RESP_ISSUE_EXCEPTION 1
> +#define GHCB_HV_RESP_MALFORMED_INPUT 2
> +
> /*
> * Error codes related to GHCB input that can be communicated back to the guest
> * by setting the lower 32-bits of the GHCB SW_EXITINFO1 field to 2.
> diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
> index c6c852485900..c78d18ba179c 100644
> --- a/arch/x86/kvm/svm/sev.c
> +++ b/arch/x86/kvm/svm/sev.c
> @@ -3430,7 +3430,7 @@ static int sev_es_validate_vmgexit(struct vcpu_svm *svm)
> dump_ghcb(svm);
> }
>
> - ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, 2);
> + ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, GHCB_HV_RESP_MALFORMED_INPUT);
> ghcb_set_sw_exit_info_2(svm->sev_es.ghcb, reason);
>
> /* Resume the guest to "return" the error code. */
> @@ -3574,7 +3574,7 @@ static int setup_vmgexit_scratch(struct vcpu_svm *svm, bool sync, u64 len)
> return 0;
>
> e_scratch:
> - ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, 2);
> + ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, GHCB_HV_RESP_MALFORMED_INPUT);
> ghcb_set_sw_exit_info_2(svm->sev_es.ghcb, GHCB_ERR_INVALID_SCRATCH_AREA);
>
> return 1;
> @@ -4121,7 +4121,7 @@ static int snp_handle_ext_guest_req(struct vcpu_svm *svm, gpa_t req_gpa, gpa_t r
> return snp_handle_guest_req(svm, req_gpa, resp_gpa);
>
> request_invalid:
> - ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, 2);
> + ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, GHCB_HV_RESP_MALFORMED_INPUT);
> ghcb_set_sw_exit_info_2(svm->sev_es.ghcb, GHCB_ERR_INVALID_INPUT);
> return 1; /* resume guest */
> }
> @@ -4314,7 +4314,7 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu)
> if (ret)
> return ret;
>
> - ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, 0);
> + ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, GHCB_HV_RESP_SUCCESS);
> ghcb_set_sw_exit_info_2(svm->sev_es.ghcb, 0);
>
> exit_code = kvm_ghcb_get_sw_exit_code(control);
> @@ -4364,7 +4364,7 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu)
> default:
> pr_err("svm: vmgexit: unsupported AP jump table request - exit_info_1=%#llx\n",
> control->exit_info_1);
> - ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, 2);
> + ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, GHCB_HV_RESP_MALFORMED_INPUT);
> ghcb_set_sw_exit_info_2(svm->sev_es.ghcb, GHCB_ERR_INVALID_INPUT);
> }
>
> @@ -4394,7 +4394,7 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu)
> case SVM_VMGEXIT_AP_CREATION:
> ret = sev_snp_ap_creation(svm);
> if (ret) {
> - ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, 2);
> + ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, GHCB_HV_RESP_MALFORMED_INPUT);
> ghcb_set_sw_exit_info_2(svm->sev_es.ghcb, GHCB_ERR_INVALID_INPUT);
> }
>
> diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> index c1e29307826b..5ebe8177d2c6 100644
> --- a/arch/x86/kvm/svm/svm.c
> +++ b/arch/x86/kvm/svm/svm.c
> @@ -2975,7 +2975,7 @@ static int svm_complete_emulated_msr(struct kvm_vcpu *vcpu, int err)
> if (!err || !sev_es_guest(vcpu->kvm) || WARN_ON_ONCE(!svm->sev_es.ghcb))
> return kvm_complete_insn_gp(vcpu, err);
>
> - ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, 1);
> + ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, GHCB_HV_RESP_ISSUE_EXCEPTION);
> ghcb_set_sw_exit_info_2(svm->sev_es.ghcb,
> X86_TRAP_GP |
> SVM_EVTINJ_TYPE_EXEPT |
